ML17317B343

Forwards NRC to Westinghouse Requesting Addl Info Re Small Break LOCA Analyses & Analysis Methods.Nrc Will Eventually Require Documentation Re Applicability of Westinghouse Results to Analyses at Facility

ML17317B343
Person / Time
Site:	Cook
Issue date:	06/11/1979
From:	Schwencer A Office of Nuclear Reactor Regulation
To:	Tillinghast J INDIANA MICHIGAN POWER CO.
References
NUDOCS 7907240547
Download: ML17317B343 (5)

Text

IJUNE 1 I, 197S Docket N

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. Nr.'ohn "t, Vice President Indiana and Michigan Electric Company Indiana and Hichigan Power Company Post Office Box 18 Bowling Green Station New York, New York 10004 Dear Hr.

SUBJECT:

INFORMATION COPY OF REqUEST FOR ADDITIONAL INFORMATION REGARDING WESTINGHOUSE StNLL BREAK LOCA ANALYSIS e

As we discussed with you during our meeting on May 30, 1979, the NRC staff is evaluating certain aspects of the NRC licensing process in light of the Three tiile Island Unit 2 (THI-2) accident of Harch 28, 1979.

One of the aspects being addressed by the staff in its evaluation is the status of the models used in safety analyses, especially with regard.to transients and small break LOCAs; Enclosed is a copy of an NRC letter, dated June 4, 1979, requesting information from your nuclear steam supply. vendor, the Westinghouse Electric Corporation, regapding small break LOCA analyses and analysis methods.

This enclosure is provided for your infomiation.

It is our understanding that you are participating.in this effort as it applies to your licensed power plants through an owners group.

At some point i'n this effort we will require that you document the applicability of the results of these Westinghouse analyses to your plants.

To that end, a copy of all cor respondence to Westinghouse and the owners group on this matter will be provided to you and placed in our files on your specific plants.

Please contact P.

D. O'Reilly, the staff's assigned project manager.

for this matter, if you have any questions.

Sincerely, losure

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UNITED STATES

'UCLEAR REGULATORY COMMISStON VIASHlt4GTOt4, D. C. 2D555 JUNE 1 1 1979 Docket Nos.

50-315 and 50-316 Mr. John Tillinghast, Vice President Indiana and Michigan Electric Company Indiana and Michigan Power Company Post Office Box 18 Bowling Green Station New York, New Yolk 10004

SUBJECT:

INFORMATION COPY OF RE(VEST FOR ADDITIONAL INFORMATION REGARDING WESTINGHOUSE SMALL BREAK LOCA ANALYSIS As we discussed with you during our meeting on May 30, 1979, the NRC.

staff is evaluating certain aspects of the NRC licensing process in light of the Three Mile Island Unit 2 (TMI-2) accident of March 28, 1979.

One of the aspects being addressed by the staff in its evaluation is the status of the models used in safety analyses, especially with regard to transients and small break LOCAs.

Enclosed is a copy of an NRC letter, dated June 4, 1979, requesting information from your nuclear steam supply vendor, the Westinghouse Electric. Corporation, regarding small break LOCA analyses and analysis methods.

Thjs enclosure is provided for your information.

It is our understanding that you are participating in this effort as it applies to your licensed power plants through an owners group.

At some point in this effort we will require that you document the applicability of the results of these Westinghouse analyses to your plants.

To that end, a copy of all correspondence to Westinghouse and the owners group on this matter will be provided to you and placed in our files on your specific plants.

Please contact P.

D.

0.Reilly, the staff'.s assigned project'anager for this matter, if you have any questions.

Sincerely,

Enclosure:

NRC June 4, 1979 letter to Westinghouse cc:

w/enclosures See next page A. Schwencer, Chief Operating Reactors Branch 81 Division of Operating Reactors

r

Mr. John Ti1.linghast Indiana and Michigan Electric Company Indiana and Michigan Power 'Company JUNE 1 1 lS79 CC:

Mr. Robert W. Jurgensen Chief Nuclear Engineer American Electdic Power Service Corporation 2 Broadway New York, New York 10004 Gerald Charnoff, Esquire Shaw, Pittman, Potts and Trowbridge 1800 M Street, N.W.

Washington, D. C.

20036 David Oinsmore Comey Executive Director Citizens for a Better Environment 59 East Vaa Buren Street Chicago, Illinois 60605 Maude Reston Palenske Memorial Library 500 Market Street St. Joseph, Michigan 49085 Mr. D. Shaller, Plant Manager Donald C.

Cook Nuclear Plant P. 0.

Box 458 Bridgman, Michigan 49106 Kenneth R. Baker 2874 Robin Hood Drive Stevensville, Michigan 49127